BURLINGTON, Mass.--(BUSINESS WIRE)--Dyax Corp. (NASDAQ: DYAX) announced today the decision to discontinue the Company’s Phase 2 trial investigating ecallantide in the acute treatment of angiotensin converting enzyme (ACE) inhibitor-induced angioedema based upon the results of an interim analysis. This double-blind, placebo-controlled, randomized, dose-ranging study was designed to evaluate the efficacy and safety of ecallantide (10, 30, or 60 mg subcutaneous doses) compared to placebo, with a goal of enrolling 176 patients. The primary endpoint was the proportion of patients meeting a set of criteria indicating eligibility for discharge from the emergency department within 6 hours following study drug administration.